Cho tam giác ABC cân tại A,đường cao AH (Hthuộc BC): a, chứng minh tam giác AHB= tam giác AHC.
b, từ H kẻ đường thẳng song song với AC ,cắt AB tại D. chứng minh AD=DH.
c, gọi E là trung điểm AC, CD cắt AH tại G. chứng minh B, G,E thẳng hàng.

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%